Airtel — fastag activation window not displaying in airtel thanks app

Sir,
i received my fastag on 20th Dec 2019. After receiving my fastag i tried to activate it on airtel thanks app. I tried these steps to activate it-
1. opened my thanks app
2. tap on bank icon
3. tap on fastag icon

but after clicking on fastag icon i didn't find any activation option. it is still showing order shipped (screenshot pdf file attached) that's why i am not able to activate my fastag. i have attached screenshot for your reference.
Registered moble no. - [protected]